P1051 - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What does this mean?

P1051 Possible Causes

  • Faulty Air Fuel Ratio Sensor 1 Bank 2
  • Air Fuel Ratio Sensor 1 Bank 2 harness is open or shorted
  • Air Fuel Ratio Sensor 1 Bank 2 circuit poor electrical connection

First diagnose P1051 code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the P1051 code

    Labor: 1.0

    The cost of diagnosing the P1051 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the P1051 code detected?

The current amperage in the heated air fuel ratio (A/F) sensor 1 heater circuit is out of the normal range. An excessively low voltage signal is sent to Engine Control Module (ECM) through the heated air fuel ratio (A/F) sensor 1 heater.

P1051 Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1051 Meaning

The Engine Control Module (ECM) performs ON/OFF duty control of the Air Fuel Ratio (A/F) sensor 1 heater corresponding to the engine operating condition to keep the temperature of A/F sensor 1 element at the specified range.
OBDII Code P1051 - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2 - Engine-Codes.com

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